| O.S. Ref | Description | Distance |
| 763073 | Start in the lane from Aston Sandford to A.4129 opposite the centre of the Bucks CC sign in a lay by approx 1Km from the A.4129. | 0 km |
| 768065 | Proceed to the A.4129 where bear left (M) onto the A.4129 to start a circuit. | 0.89 km |
| 794046 | Go through Longwick to the Sportsman roundabout at the junction with the B4009 | 4.25 km |
| 823070 | Take the first exit (M) onto the B4009 (Lower Icknield Way) to Little Kimble. Turn left (M) immediately before the railway bridge, along Marsh Road. | 7.98 km |
| 790115 | Bear right (M) at 'T' junction, going through Marsh to the junction with the Bishopstone Road. Bear left through Bishopstone to the crossroads at Alwyn Lawn. | 14.25 km |
| 747088 | Turn left (M) to the crossroads on the outskirts of Haddenham | 19.54 km |
| 742068 | Turn left (M) on Stanbridge Road to Kingsey. | 22.39 km |
| 768065 | Repeat circuit, again continuing past junction | 48.99 km |
| 777061 | Finish at crossroads sign, just west and short of junction with road to Ilmer. | 50 km |